gpio: merrifield: Add GPIO <-> pin mapping ranges via callback

When IRQ chip is instantiated via GPIO library flow, the few functions,
in particular the ACPI event registration mechanism, on some of ACPI based
platforms expect that the pin ranges are initialized to that point.

Add GPIO <-> pin mapping ranges via callback in the GPIO library flow.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

drivers/gpio/gpio-merrifield.c

@@ -396,14 +396,35 @@ static const char *mrfld_gpio_get_pinctrl_dev_name(struct mrfld_gpio *priv)
 	return name;
 }
 
-static int mrfld_gpio_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+static int mrfld_gpio_add_pin_ranges(struct gpio_chip *chip)
 {
+	struct mrfld_gpio *priv = gpiochip_get_data(chip);
 	const struct mrfld_gpio_pinrange *range;
 	const char *pinctrl_dev_name;
+	unsigned int i;
+	int retval;
+
+	pinctrl_dev_name = mrfld_gpio_get_pinctrl_dev_name(priv);
+	for (i = 0; i < ARRAY_SIZE(mrfld_gpio_ranges); i++) {
+		range = &mrfld_gpio_ranges[i];
+		retval = gpiochip_add_pin_range(&priv->chip, pinctrl_dev_name,
+						range->gpio_base,
+						range->pin_base,
+						range->npins);
+		if (retval) {
+			dev_err(priv->dev, "failed to add GPIO pin range\n");
+			return retval;
+		}
+	}
+
+	return 0;
+}
+
+static int mrfld_gpio_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
 	struct mrfld_gpio *priv;
 	u32 gpio_base, irq_base;
 	void __iomem *base;
-	unsigned int i;
 	int retval;
 
 	retval = pcim_enable_device(pdev);
@@ -444,30 +465,16 @@ static int mrfld_gpio_probe(struct pci_dev *pdev, const struct pci_device_id *id
 	priv->chip.base = gpio_base;
 	priv->chip.ngpio = MRFLD_NGPIO;
 	priv->chip.can_sleep = false;
+	priv->chip.add_pin_ranges = mrfld_gpio_add_pin_ranges;
 
 	raw_spin_lock_init(&priv->lock);
 
-	pci_set_drvdata(pdev, priv);
 	retval = devm_gpiochip_add_data(&pdev->dev, &priv->chip, priv);
 	if (retval) {
 		dev_err(&pdev->dev, "gpiochip_add error %d\n", retval);
 		return retval;
 	}
 
-	pinctrl_dev_name = mrfld_gpio_get_pinctrl_dev_name(priv);
-	for (i = 0; i < ARRAY_SIZE(mrfld_gpio_ranges); i++) {
-		range = &mrfld_gpio_ranges[i];
-		retval = gpiochip_add_pin_range(&priv->chip,
-						pinctrl_dev_name,
-						range->gpio_base,
-						range->pin_base,
-						range->npins);
-		if (retval) {
-			dev_err(&pdev->dev, "failed to add GPIO pin range\n");
-			return retval;
-		}
-	}
-
 	retval = gpiochip_irqchip_add(&priv->chip, &mrfld_irqchip, irq_base,
 				      handle_bad_irq, IRQ_TYPE_NONE);
 	if (retval) {
@@ -480,6 +487,7 @@ static int mrfld_gpio_probe(struct pci_dev *pdev, const struct pci_device_id *id
 	gpiochip_set_chained_irqchip(&priv->chip, &mrfld_irqchip, pdev->irq,
 				     mrfld_irq_handler);
 
+	pci_set_drvdata(pdev, priv);
 	return 0;
 }